﻿// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
// 
// Copyright (c) 2012, Dr. Masroor Ehsan
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//    * Redistributions of source code must retain the above copyright
//      notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above copyright
//      notice, this list of conditions and the following disclaimer in the
//      documentation and/or other materials provided with the distribution.
//    * Neither the name of the <organization> nor the
//      names of its contributors may be used to endorse or promote products
//      derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// $Id: BillableItemsCatalog.cs 12 2012-01-27 06:11:46Z masroore@gmail.com $
// 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace LWObjects
{
    public class BillableItemsCatalog : SortedDictionary<string, BillableItem>
    {
        private static readonly BillableItemsCatalog _Instance = new BillableItemsCatalog();

        private BillableItemsCatalog()
        {
        }

        public static BillableItemsCatalog Instance
        {
            get { return _Instance; }
        }

        public BillableItem FindItemById(string id)
        {
            BillableItem result;
            TryGetValue(id, out result);
            return result;
        }

        public BillableItem FindItemByName(string name)
        {
            return (from kvp in this
                    where kvp.Value.Name == name
                    select kvp.Value).FirstOrDefault();
        }

        public void LoadFromDefinitionFile(string fname)
        {
            Instance.Clear();
            using (var sr = new StreamReader(fname, Encoding.Default))
            {
                string line;
                while ((line = sr.ReadLine()) != null)
                {
                    var item = new BillableItem();
                    item.Deserialize(line);
                    Instance.Add(item.Code, item);
                }
            }
        }

        public void SaveToDefinitionFile(string fname)
        {
            var sb = new StringBuilder();

            foreach (var item in Values)
            {
                sb.AppendLine(item.Serialize());
            }

            using (var sw = new StreamWriter(fname, false, Encoding.Default))
            {
                sw.Write(sb.ToString());
            }
        }
    }
}